Formal languages | Models of computation | Automata (computation)
In automata theory, a deterministic pushdown automaton (DPDA or DPA) is a variation of the pushdown automaton. The class of deterministic pushdown automata accepts the deterministic context-free languages, a proper subset of context-free languages. Machine transitions are based on the current state and input symbol, and also the current topmost symbol of the stack. Symbols lower in the stack are not visible and have no immediate effect. Machine actions include pushing, popping, or replacing the stack top. A deterministic pushdown automaton has at most one legal transition for the same combination of input symbol, state, and top stack symbol. This is where it differs from the nondeterministic pushdown automaton. (Wikipedia).
Theory of Computation 7. Pushdown Machines ADUni
From playlist [Shai Simonson]Theory of Computation
4. Pushdown Automata, Conversion of CFG to PDA and Reverse Conversion
MIT 18.404J Theory of Computation, Fall 2020 Instructor: Michael Sipser View the complete course: https://ocw.mit.edu/18-404JF20 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP60_JNv2MmK3wkOt9syvfQWY Quickly reviewed last lecture. Defined context free grammars (CFGs) a
From playlist MIT 18.404J Theory of Computation, Fall 2020
Simple Machines (1 of 7) Pulleys; Defining Forces, Distances and MA
For the pulley simple machine this video defines the terms input and output force, input and output distance and mechanical advantage. A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as the simplest mechanis
From playlist Mechanics
How did Automatic Transmissions Beat Out Manuals?
For ages, manual transmissions were the best way to control the shifting in cars, but recent advances have made the automatic dominant. Manual transmissions are, unfortunately, become a dying a breed in the US, but let’s look at why. Automatic transmissions were invented by GM in the 193
From playlist Concerning History
Spring toggle mechanism enables to reach end positions of a lever quickly and holds it there firmly. The pink double crank represents action from outside.
From playlist Mechanisms
Verónica Becher: Independence of normal words
Abstract : Recall that normality is a elementary form of randomness: an infinite word is normal to a given alphabet if all blocks of symbols of the same length occur in the word with the same asymptotic frequency. We consider a notion of independence on pairs of infinite words formalising
From playlist Logic and Foundations
Theory of Computation Recitation 5
Theory of Computation Recitation 5 aduni
From playlist [Shai Simonson]Theory of Computation
Simple Machines (3 of 7) Pulleys; Calculating Forces, Distances, MA, Part 2
For the pulley simple machine shows how to calculate the input force, input distance and the mechanical advantage. A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechani
From playlist Mechanics
27c3: Hackers and Computer Science (en)
Speaker: Sergey Although most academics and industry practitioners regard "hacking" as mostly ad-hoc, a loose collection of useful tricks essentially random in nature, I will argue that hacking has in fact become a "distinct research and engineering discipline" with deep underlying engine
From playlist 27C3: We come in peace
Simple Machines (2 of 7) Pulleys; Calculating Distances, Forces, MA, Part 1
For the pulley simple machine shows how to calculate the input and output distances, the input and output forces and mechanical advantage. A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as the simplest mech
From playlist Mechanics
Simple Machines (4 of 7) Pulleys; Calculating the Amount of Work Done
For the pulley simple machine shows how to calculate the amount of work done when raising an object and why simple machines do not make your work easier! A simple machine is a mechanical device that changes the direction and the magnitude of a force. In general, they can be defined as th
From playlist Mechanics
6. TM Variants, Church-Turing Thesis
MIT 18.404J Theory of Computation, Fall 2020 Instructor: Michael Sipser View the complete course: https://ocw.mit.edu/18-404JF20 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP60_JNv2MmK3wkOt9syvfQWY Quickly reviewed last lecture. Showed that various TM variants are al
From playlist MIT 18.404J Theory of Computation, Fall 2020
Theory of Computation Recitation 4
Theory of Computation Recitation 4 aduni
From playlist [Shai Simonson]Theory of Computation
Slider crank mechanism with satellite pulley
The diameter of the big pulley is double the one of the green pulley. The length of each crank = R The slider's stroke = 4R The belt should be toothed. It is possible to use chain drive instead of belt one. STEP files of this video: http://www.mediafire.com/file/frn0cmys8sedruy/SliderCrank
From playlist Mechanisms
Theory of Computation 8. CFGs and NPDMs ADUni
From playlist [Shai Simonson]Theory of Computation
Torque Converter, How does it work?
Most of us enjoy the smooth and effortless feeling of driving in an automatic transmission car. The driving is effortless because you don’t need to worry about gear changing and you don’t have a clutch pedal to operate. In an automatic transmission car the work, of the clutch pedal, is aut
From playlist Automobile Engineering
ElixirConf 2015 - The road to intellij-elixir 1.0.0 By Luke Imhoff
Learn how naively copying a grammar file from one parser generator to another won't work. Go back to the beginning and learn about lexers vs parsers, but discover that the power of interpolation changes the computational complexity and forces the lexer to be a push-down automata instead of
From playlist ElixirConf 2015
10. Computation History Method
MIT 18.404J Theory of Computation, Fall 2020 Instructor: Michael Sipser View the complete course: https://ocw.mit.edu/18-404JF20 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP60_JNv2MmK3wkOt9syvfQWY Quickly reviewed last lecture. Defined configurations and computation
From playlist MIT 18.404J Theory of Computation, Fall 2020